Overwrite argument to copy command?

[paues]

What is the difference between using the copy command with and without the overwrite argument? The results seem to be identical (see code below).

Code: Select all

close @all wfcreate(page=p1) a 2005 2010 series x=1 series y=1 pagecreate(page=p2) a 2000 2010 series x=2 series y=2 copy p1\x copy(overwrite) p1\y show x y